menthol


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menthol,

white crystalline substance with a characteristic pungent odor. It is derived from the oil of the peppermint plant, Mentha piperita (see mintmint,
in botany, common name for members of the Labiatae, a large family of chiefly annual or perennial herbs. Several species are shrubby or climbing forms or, rarely, small trees.
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), or prepared synthetically from coal tar. An alcohol, menthol is freely soluble in ethyl alcohol, ether, and chloroform. It is a local anesthetic and helps relieve itching, and because it imparts a tingling sensation to the skin, it is used in after shave lotions and skin fresheners. It is also used in throat lozenges, inhalers, and as a flavoring.

Menthol

 

3-methyl-6-isopropylcyclohexanol; colorless crystals with a peppermint odor and a slightly bitter taste.

Menthol is readily soluble in organic solvents and slightly soluble in water. It has a strong cooling effect on the skin. There are 12 known stereoisomers, the most widely occurring in nature being the levorotatory ( — )-menthol (melting point, 43°C; boiling point, 216°C). This form is the principal constituent of peppermint oil (to 50 percent) and Japanese mint oil (to 90 percent); the congelation process is used to extract it. Menthol is usually synthesized by the hydrogenation of thymol.

Menthol is a mild analgesic and disinfectant. It is used externally in alcohol, ether-alcohol, and oil-based solutions to relieve itching, neuralgia, and migraine. Menthol ointments, inhalants, and nose drops are prescribed for inflammations of the upper respiratory tract (common cold, tracheitis). Menthol is prepared in emulsion form for internal use as a sedative in the treatment of certain gastrointestinal diseases. Ingakamf inhalers, Zelenin drops, and Validol are menthol-containing products. Menthol is also used in perfume and cosmetics (in dental-care products), in the food industry (liqueurs, candy), and in flavoring tobacco.

menthol

[′men‚thȯl]
(organic chemistry)
CH3C6H9(C3H7)OH An alcohol-soluble, white crystalline compound that may exist in levo form or a mixture of dextro and levo isomers; used in medicines and perfumes, and as a flavoring agent. Also known as peppermint camphor.

menthol

an optically active organic compound found in peppermint oil and used as an antiseptic, in inhalants, and as an analgesic. Formula: C10H20O
References in periodicals archive ?
The proposed ordinance is designed to address two major groups, youth and minorities, who have been targeted in successful, well-financed advertising campaigns that promote menthol cigarettes and flavored non-cigarette tobacco products.
In order to examine the hypothesis that stress during transport of Nile tilapia fingerlings can be reduced using appropriate doses of anesthetics, we assessed the effects of various concentrations of menthol, eugenol and benzocaine on the time interval for anesthesia induction, changes in biochemical and hematological parameters, and the survival rates of fingerlings by simulating the conditions normally used for transport.
02 million used flavored hookah tobacco, 910,000 used flavored cigars, 900,000 used menthol cigarettes, 690,000 used flavored smokeless tobacco products, and 120,000 used flavored pipe tobacco in the past 30 days (Table).
Newport and Camel are two of the largest players in menthol cigarettes.
The findings from the Propel Centre for Population Health Impact at the University of Waterloo mark the first time that menthol cigarettes have been directly linked to elevated nicotine addiction among youth in Canada.
The oil extracted from the peppermint plant contains a host of compounds, but the most abundant and perhaps the most pharmacologically important is menthol.
A BAN on menthol cigarettes, ten-packs and small tobacco pouches will increase the black market's appeal to smokers, retailers have warned.
The one exception was menthol cigarettes, which account for about a third of the U.
The brown side is warming and soothing, while the white side contains menthol.
In the same way that warnings about the rise of fascism have come to signal the start of elections in continental Europe, so there is no more reliable indicator of the fall of empire than an outright ban on menthol cigarettes.
As part of a package of smoking-related proposals, the parliament also voted for menthol cigarettes to be banned in eight years' time and rejected calls for e-cigarettes to be sold only on medicinal grounds, rather than being sold direct to consumers.